Vertical Well and Wirtual Well Trajectory Control Colume Theoretical Research

If well deflection beyond a certain range and unable to reach the request of geological exploration and development, it will become an unqualified well. In some places, anti-deviation problem of vertical well is so outstanding that the difficulty of controlling the trajectory of straight well is even more difficult than directional well. So the anticline problem of vertical well is very important. At present, the deviation control technology of straight well is mainly realized by improving the structure of the drilling tool. The deviation control technology of (a section of) vertical wells is the foundation of subsequent processing. This article is based on final target control range which is given by conventional drilling, determining middle key control point and even the control range of the whole well section through gradual change in mathematics, establishing mathematical model through the three-dimensional transformation matrix in computer graphics and using Matlab software to realize 3D visualization. It can also give target deviation in trajectory control through the established mathematical algorithm and can be combined with rotary steering drilling tool and MWD to realize trajectory control. This provides the visualization of trajectory key control point for drilling operations and has practical value for the improvement of target hitting quality.